Browsing by Author "Okunsebor, S.A.,"
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Item Open Access LENGTH-WEIGHT RELATIONSHIP AND CONDITION FACTOR OF BARBUS ' 0CCIDENTALIS (CYPRINIDAE) IN RIVER UKE, NASARAWA STATE, NIGERIA(Department of Zoology, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi, 2019-12-18) Cheka, B.C,; Okunsebor, S.A.,; Banyigyi, A.H.; Ameh, S.A.The knowledge of some quantitative aspects of fish such as length-weight relationship and condition factor,studies is an important tool for the study 'of fishery biology. The fish samples were purchased from the landings of fisherfolks of River Uke using fishing gears such as cast nets, traps, hook and line three times monthly from March to August 2017 covering the rainy and dry season. The total length and weight of 219 Barbus occidentalis obtained from River Uke were examined. The weight of Barbus occidentalis sampled ranged from 15.0-996.9g and was , determined to the nearest O.lg using electronic weighing balance model BL20001. The total length of was 10.7-43.5cm were recorded .using meter rule to the nearest 0.1 cm. The length and weight relationship of Barbus occidentalis showed positive correlation (r=0.858) in both sex. The regression exponent (b<3) showed negative allometric growth pattern. The mean condition factor (K) was (1.079) in both sexes which showed that the condition and the well being of a Barbus occidentalis was good in River Uke. This may be attributed to the availability of food materials and good physicochemical parameters of the River.Item Open Access Zooplankton Distributions, Relative Abundance and Seasonal Variation Ol‘ Bodna River In Kvvali Area Council, Abuja.(Department of Zoology, Faculty Of Natural And Applied Sciences, Nasarawa State University, Keffi, 2020-03-04) Sani, B.M.,; Okunsebor, S.A.,; Banyigyi, A.H.; Makpo, J.D.Rivers are vital and vulnerable freshwater systems that are critical for the sustenance of all lives. One of the resourceful Rivers in Kwali Council is River Bodna. This River zooplankton species distribution, relative abundance and seasonal variation were investigated for information to ascertain effects of human activities on the biological properties of the River to enhance their conservation and management. The zooplankton samples were collected with standard zooplankton net of 50pm mesh size by horizontal trawling in the River sampling stations. Collected samples were poured into a zooplankton bottle to the level of 100ml and one ml of 4% formalin was added. 10ml of water sample was used to examined the zooplankton in a counting chamber viewed with Olympus Biological Microscope. Descriptive analysis, and Analysis of variance (ANOVA) were used to analyze the Zooplankton species distribution, relative abundance and seasonal variation in sampled stations. The results showed three major families and 14 species of zooplankton and they are Rotifera with Brachionus species, Trichocera species, Lecane species, Asplanchna species and Pytgra species. Clcidocera with Bosmina species, Moinci species, Nauplii species and Diaphanosoma species. Copepoda with Cyclopoid copepods and Copepodiles. The family Rotifera with the species Brahioiuis calyciflorus has the highest abundance of 21.2%. The seasonal variation showed higher percentage of zooplankton of 73.4% in the wet season and was lower with 26.6% in the dry season. Variations occurred from station to station with 20%, 18% and 0% across the stations respectively in Cyclopoid copepods species. The findings of this study will be helpful to the community for conservation and management of sustainability of live food for the biological composition of the Bodna River.